hah plugins - of course ;). I'm going to have a go myself at using the wp_nav_menu inside my php if statements and see what I can get to work :) i'll let you know how I get on
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Sam JamesNov 5 '13 at 12:26

Added additional coding and queries to initial post. Almost cracked it but CSS is having issues and stuff :'(. Close though!
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Sam JamesNov 5 '13 at 14:22

Boom! Perfect! I used has_category as some of the posts overlap categories you see. I was also just using basic menu wp_nav_menu() calls rather than using the CSS as the coding above. Guru!
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Sam JamesNov 5 '13 at 15:40